From 68c5ed592fdae16982ffe36aef89faba70a32cfc Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Thu, 1 Oct 2009 15:44:19 -0700 Subject: s3cmci: DMA fixes Fixes for the DMA transfer mode of the driver to try and improve the state of the code: - Ensure that dma_complete is set during the end of the command phase so that transfers do not stall awaiting the completion - Update the DMA debugging to provide a bit more useful information such as how many DMA descriptors where not processed and print the DMA addresses in hexadecimal. - Fix the DMA channel request code to actually request DMA for the S3CMCI block instead of whatever '0' signified. - Add fallback to PIO if we cannot get the DMA channel, as many of the devices with this block only have a limited number of DMA channels. - Only try and claim and free the DMA channel if we are trying to use it. This improves the driver DMA code to the point where it can now identify a card and read the partition table. However the DMA can still stall when trying to move data between the host and memory. Signed-off-by: Ben Dooks Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/mmc/host/s3cmci.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'drivers/mmc/host/s3cmci.h') diff --git a/drivers/mmc/host/s3cmci.h b/drivers/mmc/host/s3cmci.h index 62fac6602306..c76b53dbeb61 100644 --- a/drivers/mmc/host/s3cmci.h +++ b/drivers/mmc/host/s3cmci.h @@ -8,9 +8,6 @@ * published by the Free Software Foundation. */ -/* FIXME: DMA Resource management ?! */ -#define S3CMCI_DMA 0 - enum s3cmci_waitfor { COMPLETION_NONE, COMPLETION_FINALIZE, -- cgit v1.2.3